Offshoreonly.com - Weiand 177 boost??

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Quote:

Originally Posted by kreed (Post 3042013)

Griff, bought the 2.85 pullies, but dont have belts. Would you happen to know the NAPA part# for the belts you used to buy? I know its a long shot, but arent they expensive from a blower company? Not to mention, hard to find?

They are just 10 rib serpentine belts. You can them made by Gates or at NAPA. Sorry, I don't recall what size I was using and don't have it written down anymore. You should just be able to take in your current belt and get the next size or two smaller. With a new belt, mine would just barely fit over the pullies. They are only about $40 at NAPA.

Quote:

Originally Posted by MILD THUNDER (Post 3042063)

Sorry Guys. I started this thread, and my info was all wrong. For some reason, I thought it had the smaller pulleys. I have the 3.25 top, and 7" bottom. Measured them today. So seems i am not far off!

My engines are basically 525SC's, with dart alum heads, pretty agressive roller cams. With my current props, I only turned about 5000-5100RPM. I plan to spin them to around 5300-5400, as they really make quite a bit more power as the RPM's increase (cams). Good thing is that even with my current pulley, at 5400, Im spinning the blower at 11,718 RPM. If I went to a 3.05 pulley, i'd be at 12420 rpm. Im debating what would be better, spinning the engines say at 5600RPM, or at 5300 but spinning the blower faster..

Max RPM for the 177 is at 13000 or 13500rpms. I spun mine close to that at WOT.

Quote:

Originally Posted by kreed (Post 3042135)

any chillers for 177 blowers around? Is it 100 HP gain?

Several companies make them. Price varies from about $1500 for a superchiller to over $3000 for a Whipple. With a smaller pulley and chiller, you would probably see about 50-60hp.

Thanks for all your help Griff and everone else too.:ernaehrung004:

Any of you guys know...My front cover has a oil leak. I have replaced the rear bearings and cover seals, but never had the front apart. I need to replace the gasket to fix the oil leak, but not sure if the rotors/gears will need to be re-timed or whatever. Is this simple or should i bring it to a blower shop. Dyers blowers is 10 minutes from my house.

If you have doubts, take it to Dyers. But,,, Summit has the gaskets and seals. The plates are pinned so it's not that big of a deal if you are mechically inclined. Just take it apart and reassemble in reverse order.

Quote:

Originally Posted by Old Navy (Post 3048101)

I did the rear bearings and seals myself, that was pretty cut and dry. Just not sure if things will get more involved in the front part with the gears in there?